JPH0732899B2 - Air injection dust remover - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air jet dust removing apparatus for jetting air from one or a plurality of nozzles to blow away dust and the like.

[0002]

2. Description of the Related Art In this type of conventional air jet dust remover,
For example, in order to blow off dust and the like on the surface of a thin plate-like object such as a film, air is constantly jetted from a nozzle at a constant flow velocity, or the flow velocity is periodically changed by pulsation, and the dust is removed. Since the flow rate is almost only at the time of rising of the flow velocity, the number of times of rising is small or the rising transition of rising is slow, and the dust removal efficiency is poor.

Further, for example, in Japanese Patent Laid-Open No. 64-80481, a plurality of spin nozzles twisted with one pipe shaft are provided in the axial direction of the pipe shaft and the circle in order to widen the air injection direction from the nozzle. Disclosed is an air-injection dust-removing device that automatically swivels the spin nozzles by ejecting air from all the spin nozzles while rotating the pipe shaft while projecting bearings that are scattered in the circumferential direction. ing.

However, according to this method, although the location of the air blown can be moved over a wide range by rotating the pipe shaft and turning the air injection direction, it does not positively change the flow velocity. The dust removal efficiency was not so high.

[0005]

According to the present invention, so-called pulse-like air injection can improve dust removal efficiency in proportion to the cycle, and the air injection direction is also pulse-like injection cycle. It is intended to further improve the dust removal effect by periodically switching in synchronism with.

[0006]

According to a first aspect of an air jet dust removing apparatus of the present invention, a shutter is provided at a position close to a front side of a circular jet port of a nozzle, in a direction substantially orthogonal to a directing direction of the jet port. It is equipped with a motor that is reciprocally rotatable and that has a motor that automatically repeats the shutter to reciprocate.

In the second embodiment, a shutter, which is a horizontally long plate in which a nozzle ejection port is formed horizontally and has a large number of slits at regular intervals in the longitudinal direction of the ejection port, is provided close to the front side of the ejection port. The actuator is mounted at a position such that the shutter can reciprocate in the longitudinal direction, and the shutter is reciprocally reciprocated in the longitudinal direction.

[0008]

In the case of the first embodiment, when the shutter is repeatedly reciprocally rotated at a position close to the front side of the injection port of the nozzle in a direction substantially orthogonal to the directing direction of the injection port, air injection from the injection port of the nozzle is performed. The air injection is pulsed as shown in FIG. 7, and the rising of the flow velocity of the air injection can be repeated sharply and periodically. Further, since the shutter traverses the front side of the ejection port alternately from one side to the other side and then from the other side to one side, the air from the ejection port alternately switches the direction by such movement of the shutter. To be

In the case of the second embodiment, the horizontally long jet port is in a state of being cut by a shutter having a large number of slits, and when the shutter is repeatedly moved in the longitudinal direction, a large number of the cut ports are intermittently blocked. As shown in the above, the air is jetted in a pulsed manner at each breaking port, and its direction is alternately switched.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a first embodiment in which the present invention is applied to a pistol type static eliminator / dust eliminator. This static eliminator / dust remover A
Is a pistol-shaped static eliminator 2 having a nozzle 1 protruding from the tip and a grip portion 3, and an air hose is connected to the proximal end of the grip portion 3 to feed air into the static eliminator 2. Ions generated in the static eliminator 2 are ejected together with air from the nozzle 1 so that static elimination and dust removal can be performed at the same time. This point is conventionally known.

In this static eliminator / dust eliminator A, the static eliminator 2
A hood 4 accommodating the nozzle 1 is attached to the tip of the
A motor 5 and a shutter 6 are provided in the hood 4. The shutter 6 has a circular ejection port 1 a of the nozzle 1.
The motor 5 repeatedly and reciprocally rotates at a high speed between the injection port 1a and the air outlet 7 provided in the hood 4 at a position close to the front side.

Therefore, the shutter 6 is the ejection port 1 of the nozzle 1.
When cyclically reciprocatingly rotated at a position close to the front side of a, the air from the jet port 1a is intermittently blocked at high speed by the shutter 6, so that the air is blown from the blowout port 7 of the hood 4 as shown in FIG. It becomes a pulse shape as shown. Further, the shutter 6 alternately and repeatedly crosses the front side of the ejection port 1a from one side to the other side, and then from the other side to the one side.
The direction of the air from is alternately switched by such movement of the shutter 6.

Next, FIGS. 2 and 3 show the present invention applied to an ion shower static eliminator / dust eliminator for discharging static electricity / dust by spraying ions along with air onto a human body, clothes, or articles when entering a clean room or the like. A second embodiment will be described. The details of the air injection and ion generating mechanism of this ion shower static eliminator / dust eliminator are disclosed in Japanese Patent Laid-Open No. 3-199838, so a brief description thereof will be given here.

A bowl-shaped nozzle 10 made of an insulating material is spherically supported in the center of the circular recess 9 of the housing 8.
A U-shaped ground electrode piece 12 is detachably attached to the injection port 11 of 0 so as to be longitudinally cut. A needle electrode 13 is provided at the center of the earth electrode piece 12 so as to project forward. These needle electrode 13 and ground electrode piece 12
When a corona discharge occurs between and, the ions generated by the discharge are jetted from the jet port 11 together with air from a fan (not shown) installed in the housing 8.

In such an ion shower static eliminator / dust eliminator, the motor 14 is provided outside the nozzle 10 in the recess 9.
Further, a shutter 15 which is reciprocally rotated at high speed repeatedly by the motor 14 at a position close to the front side of the ejection port 11 is mounted.

Therefore, when the shutter 15 periodically reciprocates at the position close to the front side of the ejection port 11, the air from the ejection port 11 is intermittently blocked by the shutter 15 at high speed, so that the ejection operation is pulsed. Become a state. Further, since the shutter 15 alternately and repeatedly crosses the front side of the ejection port 11 from one side to the other side, and then from the other side to the one side, the ejection port 1
The direction of air from 1 can be switched alternately.

Next, FIGS. 4 to 6 show a third embodiment of the present invention applied to a film dust removing apparatus B for removing dust on a film surface by air injection. This film dust remover B
Is a rectangular tubular shape that is installed slightly above the guide roller 17 that guides the traveling film 16 and that injects the air supplied through the air supply port 18 from the horizontally long ejection port 19 formed in the lower corner portion. The air supply duct 20, the first dust suction duct 22 that sucks dust by sucking the air injected from the air suction chamber 21 from the suction chamber 21, and the suction chamber 23 similarly.
Second dust suction duct 2 that sucks dust by sucking from
4 and.

A laterally long shutter 25 is attached to the outer surface of the lower corner of the air supply duct 20 so as to be reciprocally slidable in the longitudinal direction of the laterally long injection port 19. A large number of ribs 28 traversing the ejection port 19 are arranged at regular intervals between the parallel beam members 26 and 27 of the shutter 25, and slits 29 are formed between the ribs 28. . Therefore, the horizontally long injection port 19 is in a state in which it is cut by the numerous ribs 28 at regular intervals. One end of the shutter 25 is connected to an actuator 30 such as a linearly reciprocating electromagnet or a vibrator.

Accordingly, when the shutter 25 is periodically reciprocated at high speed by the actuator 30, a large number of laterally long jet nozzles 19 cut by the ribs 28 reciprocate as a whole. It reciprocates simultaneously due to vibration, but when viewed from the injection port 19, the ribs 28
The result is a high-speed, intermittent interruption. Therefore, the air shower from a large number of cut ports is
It is possible to remove dust by spraying on the surface of the film 16 while vibrating it in small steps at a high speed in a direction orthogonal to the traveling direction of 6.

[0020]

As described above, according to the air jet dust remover of the present invention, since the air is jetted in a pulse, so to speak, dust removal efficiency can be improved in proportion to the period. Further, the air injection direction can be periodically switched in synchronization with the pulsed injection cycle, so that the dust removal effect can be further improved.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a first embodiment of the present invention applied to a pistol type static eliminator / dust eliminator.

FIG. 2 is a front view of a second embodiment of the present invention applied to an ion shower static eliminator / dust eliminator.

FIG. 3 is a sectional view of the above.

FIG. 4 is a side view of a third embodiment of the present invention applied to a film dust removing device.

FIG. 5 is a partial sectional view of the above.

FIG. 6 is a plan view of the same.

FIG. 7 is a view showing that the air is sprayed in a pulsed manner in the air jet dust remover according to the present invention.

[Explanation of symbols]

 1 Nozzle 1a Jet Port 5 Motor 6 Shutter 10 Nozzle 11 Jet Port 14 Motor 15 Shutter 19 Jet Port 25 Shutter 29 Slit

Claims (2)

[Claims] 1. An air jet dust remover for jetting air from a nozzle to blow away dust and the like, wherein a shutter is provided at a position close to a front side of a circular jet port of the nozzle in a direction substantially orthogonal to a directing direction of the jet port. An air-injection dust-removing device comprising a motor that is mounted so as to be reciprocally rotatable and that has a motor that automatically repeats the shutter to reciprocate. 2. An air jet dust removing apparatus for jetting air from a nozzle to blow dust and the like, wherein an injection port of the nozzle is formed horizontally long and a large number of slits are provided at regular intervals in the longitudinal direction of the injection port. An air jet characterized in that a shutter, which is a horizontally long plate, is mounted so as to be capable of reciprocating in the longitudinal direction at a position close to the front side of the ejection port, and an actuator for reciprocating the shutter in the longitudinal direction is repeatedly provided. Dust removal device.